JP2016020526A - 999 gold alloy and 999 silver alloy having high hardness and high compressive strength and manufacturing method thereof - Google Patents
999 gold alloy and 999 silver alloy having high hardness and high compressive strength and manufacturing method thereof Download PDFInfo
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- JP2016020526A JP2016020526A JP2014144290A JP2014144290A JP2016020526A JP 2016020526 A JP2016020526 A JP 2016020526A JP 2014144290 A JP2014144290 A JP 2014144290A JP 2014144290 A JP2014144290 A JP 2014144290A JP 2016020526 A JP2016020526 A JP 2016020526A
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- 229910001020 Au alloy Inorganic materials 0.000 title claims abstract description 31
- 239000003353 gold alloy Substances 0.000 title claims abstract description 31
- 229910001316 Ag alloy Inorganic materials 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000010931 gold Substances 0.000 claims abstract description 30
- 238000005266 casting Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 23
- 229910052737 gold Inorganic materials 0.000 abstract description 14
- 229910052709 silver Inorganic materials 0.000 abstract description 14
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 11
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 11
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 11
- 239000004332 silver Substances 0.000 abstract description 11
- 239000010437 gem Substances 0.000 abstract 2
- 229910001751 gemstone Inorganic materials 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 18
- 229910000510 noble metal Inorganic materials 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000002156 mixing Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000010970 precious metal Substances 0.000 description 6
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000010953 base metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 238000007542 hardness measurement Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007730 finishing process Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 229910000905 alloy phase Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
Description
本発明は、９９９（３ナイン、又はスリーナイン）の純度を有するにもかかわらず、高硬度と高圧縮強度を有する金合金及び銀合金、並びにその製造方法に関するものである。
ここで３ナインとは、（イ）品位検定独立法人造幣局の基準値９９．９％（ロ）独立行政法人造幣局ホールマーク Ｐｔ９９９、又は（ハ）リング・ペンダント・ピアスなど貴金属製品品位の単位を表記している１００分率 ９９９／１０００、等をいう。
The present invention relates to a gold alloy and a silver alloy having high hardness and high compressive strength despite having a purity of 999 (3 nines or three nines), and a method for producing the same.
Here, 3 nines indicate (b) the standard value of the Mint Bureau (b) standard value 99.9% (b) the Mint Hallmark Pt999, or (c) the quality unit of precious metal products such as rings, pendants and earrings. 100-percent 999/1000, etc.
金（Ａｕ）及び銀（Ａｇ）は、資産価値の高い貴金属として、また高級宝飾品（身飾品）の材料として、極めて重要な元素（物質）である。
従来、金又は銀の加工品を製作するには、その加工特性を考慮して、少量の他の金属を配合して鋳造・溶融することが行われている。
Gold (Au) and silver (Ag) are extremely important elements (substances) as noble metals having high asset values and as materials for high-end jewelry (jewelry).
Conventionally, in order to manufacture a gold or silver processed product, a small amount of other metal is blended and cast and melted in consideration of the processing characteristics.
ところが、金又は銀の有する高級感（金属色、光沢、重量感）や資産価値を考慮して、純度の高い金又は銀の加工品（宝飾品、身飾品）の製作を試みても、その硬度や強度が不足し、加工が困難である。
すなわち、３ナインの純度を維持する金又は銀のビッカーズ硬度は、金は高々７０Ｈｖ、銀は４５Ｈｖ程度しかないため、実用品たる宝飾品や身飾品として加工しても、加工が困難であるばかりでなく、その機能や変形を防止（恒常性を維持）することができなかった。
However, in consideration of the luxury (metal color, luster, weight) and asset value of gold or silver, even if you try to produce high-purity gold or silver processed goods (jewelry, jewelry), Hardness and strength are insufficient and processing is difficult.
That is, the Vickers hardness of gold or silver that maintains the purity of 3 nines is only 70 Hv for gold and 45 Hv for silver, so that it is difficult to process even if processed as a jewelry or jewelery that is a practical product. Moreover, the function and deformation | transformation were not able to be prevented (maintenance was maintained).
発明者は、９９９（スリーナイン）の純度を維持する金、又は銀に、極めて微量のＡｌを配合して溶融することにより、金のビッカーズ硬度を７５以上に、叉銀のビッカーズ硬度を５０以上に上げることに成功し、本発明を完成した。 The inventor made gold or silver maintaining the purity of 999 (Three Nine) with a very small amount of Al and melted, thereby increasing the gold Vickers hardness to 75 or more and the fork silver Vickers hardness to 50 or more. The present invention was completed successfully.
本願発明は、下記の請求項１〜請求項１６により構成されている。
＜請求項１＞ ９９９（スリーナイン）の純度を有すると共に、幅４．００ｍｍ、厚み１．５０ｍｍの平内リングのビッカーズ硬度が７５Ｈｖ以上である金合金。
＜請求項２＞ ９９９（スリーナイン）の純度を有すると共に、幅４．００ｍｍ、厚み１．５０ｍｍの平内リングの１０％変形圧縮強度が１０ｋｇｆ以上である金合金。
＜請求項３＞ 鋳造法により作製される請求項１又は請求項２のいずれかに記載する金合金。
＜請求項４＞ 金合金が、身飾品、又は宝飾品である請求項1〜請求項３のいずれかに記載する金合金。
＜請求項５＞ 高純度のＡｕに微小量のＡｌを加えて鋳造する請求項３に記載する金合金の製造方法。
＜請求項６＞ 微小量のＡｌをＡｕで被覆して鋳造する請求項５に記載する金合金の製造方法。
＜請求項７＞ 微小量のＡｌをＡｕの薄板で包んで鋳造する請求項５又は請求項６のいずれかに記載する金合金の製造方法。
＜請求項８＞ 金合金が、身飾品、又は宝飾品である請求項５〜請求項７のいずれかに記載する金合金の製造方法。
＜請求項９＞ ９９９（スリーナイン）の純度を有すると共に、幅４．００ｍｍ、厚み１．５０ｍｍの平内リングのビッカーズ硬度が５０Ｈｖ以上である銀合金。
＜請求項１０＞ ９９９（スリーナイン）の純度を有すると共に、幅４．００ｍｍ、厚み１．５０ｍｍの平内リングの１０％変形圧縮強度が５ｋｇｆ以上である銀合金。
＜請求項１１＞ 鋳造法により作製される請求項９又は請求項１０のいずれかに記載する銀合金。
＜請求項１２＞ 銀合金が、身飾品、又は宝飾品である請求項９〜請求項１１のいずれかに記載する銀合金。
＜請求項１３＞ 高純度のＡｇに微小量のＡｌを加えて鋳造する請求項１１に記載する銀合金の製造方法。
＜請求項１４＞ 微小量のＡｌをＡｇで被覆して鋳造する請求項１３に記載する銀合金の製造方法。
＜請求項１５＞ 微小量のＡｌをＡｇの薄板で包んで鋳造する請求項１３又は請求項１４のいずれかに記載する銀合金の製造方法。
＜請求項１６＞ 銀合金が、身飾品、又は宝飾品である請求項１３〜請求項１５のいずれかに記載する銀合金の製造方法。
This invention is comprised by the following Claims 1-16.
<Claim 1> A gold alloy having a purity of 999 (Three Nine) and a Vickers hardness of a flat inner ring having a width of 4.00 mm and a thickness of 1.50 mm of 75 Hv or more.
<Claim 2> A gold alloy having a purity of 999 (Three Nine) and having a 10% deformation compressive strength of a flat inner ring having a width of 4.00 mm and a thickness of 1.50 mm of 10 kgf or more.
<Claim 3> The gold alloy according to claim 1 or 2 manufactured by a casting method.
<Claim 4> The gold alloy according to any one of claims 1 to 3, wherein the gold alloy is a jewelry or a jewelry.
<Claim 5> The method for producing a gold alloy according to claim 3, wherein a minute amount of Al is added to high-purity Au and cast.
<Claim 6> The method for producing a gold alloy according to claim 5, wherein a minute amount of Al is coated with Au and cast.
<7> A method for producing a gold alloy according to any one of claims 5 and 6, wherein a minute amount of Al is wrapped in a thin Au plate and cast.
<Claim 8> The method for producing a gold alloy according to any one of claims 5 to 7, wherein the gold alloy is a jewelry or a jewelry.
<Claim 9> A silver alloy having a purity of 999 (Three Nine) and a Vickers hardness of a flat inner ring having a width of 4.00 mm and a thickness of 1.50 mm of 50 Hv or more.
<Claim 10> A silver alloy having a purity of 999 (Three Nine) and having a 10% deformation compressive strength of a flat inner ring having a width of 4.00 mm and a thickness of 1.50 mm of 5 kgf or more.
<Claim 11> The silver alloy according to claim 9 or 10, which is produced by a casting method.
<Claim 12> The silver alloy according to any one of claims 9 to 11, wherein the silver alloy is a jewelry or a jewelry.
<13> The method for producing a silver alloy according to claim 11, wherein a minute amount of Al is added to high purity Ag and cast.
<Claim 14> The method for producing a silver alloy according to claim 13, wherein a minute amount of Al is coated with Ag and cast.
<Claim 15> The method for producing a silver alloy according to claim 13 or 14, wherein a minute amount of Al is wrapped in an Ag thin plate and cast.
<Claim 16> The method for producing a silver alloy according to any one of claims 13 to 15, wherein the silver alloy is a jewelry or a jewelry.
本願発明を以上のように構成する理由は、次のとおりである。
（ａ）従来、単なる地金以外に、公的に９９９が保証されたＡｕ又はＡｇ（以下貴金属ともいう）の実用品（身飾品、宝飾品等）は、硬度や強度等が不足し、その加工性、機能性、耐久性（恒常性）等を付加（維持）することが困難なため、ほとんど存在しない。
（ｂ）貴金属は、純品に不純物（貴金属以外の元素）を含有させることによって、その加工性、機能性、恒常性（変形防止等）を付加することができるが、純度９９９を維持するためには不純物の総量を０．１重量部以下に抑える必要がある。したがって貴金属に配合するＡｌは、０．１重量％以下に制限される（１００／１００．１＝０．９９９００…）。
（ｂ）貴金属に、前記特性を付加するために配合できる不純物（貴金属以外の元素、本願ではＡｌ）の量は、Ａｕ９９９又はＡｇ９９９の純度を維持する必要があるため、極めて微量に制限されるので、鋳造方法及び、合金方法を工夫し、厳密に管理する必要がある。
（ｃ）貴金属にＡｌを配合して鋳造する際には、その鋳造工程を真空状態（減圧下）で行うが、Ａｌは貴金属地金に含まれる微量の酸素や溶解炉内に残留する微量の酸素と反応し、貴金属と化合する前に酸化アルミナ（Ａｌ２Ｏ３）を形成し、貴金属と規定量化合せず、貴金属の地金母体内に酸化アルミナとして残留し、叉鋳造時ルツボ内にノロとしてルツボに残ってしまい、強度が得られない。
すなわち、微量金属（Ａｌ）は、単に溶解容器（坩堝）内に投入するだけでは、その全量が貴金属と反応せず残ってしまうので、貴金属で包んで溶解容器（坩堝）内に投入し、溶解する必要がある。
The reason why the present invention is configured as described above is as follows.
(A) Conventionally, in addition to mere bullion, Au or Ag (hereinafter also referred to as precious metals), which is publicly guaranteed 999, lacks hardness, strength, etc. Since it is difficult to add (maintain) processability, functionality, durability (constancy), etc., it hardly exists.
(B) The precious metal can be added with impurities (elements other than the precious metal) in the pure product to add workability, functionality, and constancy (deformation prevention, etc.), but to maintain the purity of 999. It is necessary to keep the total amount of impurities to 0.1 parts by weight or less. Therefore, Al mixed with the noble metal is limited to 0.1% by weight or less (100 / 100.1 = 0.99900...).
(B) The amount of impurities (elements other than noble metals, Al in the present application) that can be blended to add the above characteristics to the noble metal is limited to a very small amount because it is necessary to maintain the purity of Au999 or Ag999. It is necessary to devise and strictly manage the casting method and the alloy method.
(C) When casting Al with precious metal, the casting process is performed in a vacuum state (under reduced pressure). Al is a small amount of oxygen contained in the precious metal ingot and a small amount of residual metal in the melting furnace. It reacts with oxygen to form alumina oxide (Al 2 O 3 ) before combining with the noble metal, does not match the specified amount with the noble metal, and remains as the alumina oxide in the base metal of the noble metal, and in the crucible during casting As it remains in the crucible, the strength cannot be obtained.
In other words, if the trace amount metal (Al) is simply put into the melting container (crucible), the whole amount remains without reacting with the noble metal, so it is wrapped in the noble metal and put into the melting container (crucible) and dissolved. There is a need to.
本願発明の金合金、又は銀合金によれば、公的に９９９が保証されたＡｕ、又はＡｇの実用品（身飾品、宝飾品等）が製作できるので、資産価値を維持したまま製作された実用品を、実生活に利用して楽しむことができるという効果を有する。 According to the gold alloy or the silver alloy of the present invention, it is possible to produce a practical product (jewelry, jewelry, etc.) of Au or Ag that is officially guaranteed 999, so that the asset value is maintained. It has the effect that it can be enjoyed by using real goods in real life.
下記に記載する配合と方法により金合金の地金を鋳造した。
（１）地金（合金）の配合
（イ）Ａｕ（純度９９．９９重量％以上）：１００重量部
（ロ）Ａｌ：０．０５重量部
（２）鋳造条件
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
鋳型温度：７８０℃
鋳造温度：１１００℃
鋳型へセットしてから鋳造までの時間：３分３０秒
なお、鋳造に際し、Ａｌは、圧延して板状にしたＡｕで上下を挟んで鋳型にセットした（図１、図２参照）。
A gold alloy ingot was cast by the composition and method described below.
(1) Blending of bare metal (alloy) (a) Au (purity 99.99% by weight or more): 100 parts by weight (b) Al: 0.05 part by weight (2) Casting machine used for casting conditions: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz Using carbon crucible Co., Ltd. Nissei Sales Manufacturer Co., Ltd. Nichiden High Frequency Electric furnace: Yasui Intertec Co., Ltd. Mold temperature: 780 ° C
Casting temperature: 1100 ° C
Time from setting to mold to casting: 3 minutes 30 seconds In casting, Al was set in the mold by sandwiching the upper and lower sides with Au rolled and plate-like (see FIGS. 1 and 2).
（３）平打ちリング（図３）の作製
検体の寸法：幅４．００ｍｍ、厚み１．５０ｍｍ
検体数：２０本
使用合金（前記製作した地金）量：１００ｇ
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz
カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
(3) Production of flat ring (FIG. 3) Dimension of specimen: width 4.00 mm, thickness 1.50 mm
Number of specimens: 20 Alloys used (the bullion produced above): 100 g
Casting machine used: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz
Nissei Sales Co., Ltd. using carbon crucible Manufacturer Nidec High Frequency Electric Furnace: Yasui Intertech Co., Ltd.
前記リングの作製において、ツリー形状（鋳型になる形状）、埋没方法、脱漏方法、及び鋳造方法は、下記の条件で行った。
ツリー形状：直径８ｍｍ、高さ１２０ｍｍの円柱に、試験資材を円柱に対して、上方向へ角度２５度で上から４本ずつ配置し、２０ｍｍ下の段から付けて、５段のツリー形状とした。
埋没方法：（株）ノリタケカンパニー社のギフトを使用し、水との混合比３８％で、（株）愛工舎製作所の混和器で２分混合し、（株）安井インターテックの脱法器で1分空気を抜き、1時間乾燥の為放置した（室温２５℃、湿度６０％）。
脱漏方法：（株）カトーの温風ヒーターを使用し、温度設定１５０℃、１時間タイマーオフで中のワックスを抜いた。
鋳造方法：鋳型温度７８０℃、鋳造温度１１００℃、鋳型へセットしてから鋳造までの時間は、約３分３０秒であった。
In the production of the ring, a tree shape (a shape to become a mold), a burying method, a leakage method, and a casting method were performed under the following conditions.
Tree shape: In a cylinder with a diameter of 8 mm and a height of 120 mm, four test materials are arranged from the top at an angle of 25 degrees upward with respect to the cylinder. did.
Method of burying: Using a gift from Noritake Co., Ltd., mixing with water at a mixing ratio of 38% for 2 minutes with a mixer at Aikosha Seisakusho Co., Ltd. The air was evacuated and left to dry for 1 hour (room temperature 25 ° C., humidity 60%).
Leakage method: Using a hot air heater of Kato Co., Ltd., the wax was removed by setting the temperature at 150 ° C. for 1 hour with the timer off.
Casting method: mold temperature 780 ° C., casting temperature 1100 ° C., the time from setting to casting until casting was about 3 minutes 30 seconds.
以下、通常の磨き仕上げ工程（電解研磨、磁気バレル、表面処理、形状成型、磨き工程等）を経て平打ちリングを得た（ｂ）。 Hereinafter, a flat ring was obtained through a normal polishing finishing process (electropolishing, magnetic barrel, surface treatment, shape molding, polishing process, etc.) (b).
前記〔００１０〕〜〔００１３〕と同様の方法により、下記の（ａ）及び（ｃ）の配合で平打ちリングを作製した。
（ａ）Ａｕ９９９９
（ｃ）Ａｕ９９９９＋Ａｌ（０．０９重量部）
なお、前記（ａ）〜（ｃ）の平打ちリングは、９９９の純度を保持していた。
By the same method as in the above [0010] to [0013], a flat ring was produced with the following blends (a) and (c).
(A) Au9999
(C) Au9999 + Al (0.09 parts by weight)
The flat rings (a) to (c) maintained a purity of 999.
（４）ビッカーズ硬度の測定
ビッカーズ硬度の測定（微小硬度試験）は、アカシ微小硬度試験器ＭＶＫ−Ｇ３５００ＡＴを用いた（図４）。
ビッカーズ硬度は、平打ちリングにダイヤモンドの圧痕を付け（図４（Ａ）、微小硬度測定１）、次に微小硬度距離（図４（Ｂ））を測定し、硬度表を参照して数値をだした。
測定はJIS規格の測定方法に則り、硬度測定を５回行い、その最低数値及び最高数値の2つを切り捨て、中旬値である、３つの数値の平均値を算出した。
表１に測定結果を示す。
表中（ｂ）及び（ｃ）は、Ａｕ９９９９１００重量部にＡｌを０．０５又は０．０９重量部配合した合金を表す。
(4) Measurement of Vickers hardness Vickers hardness was measured (micro hardness test) using an Akashi micro hardness tester MVK-G3500AT (FIG. 4).
Vickers hardness is measured by measuring the hardness distance (Fig. 4 (B)) by making a diamond indentation on the flat ring (Fig. 4 (A), micro hardness measurement 1) and then referring to the hardness table. It was.
In accordance with the measurement method of the JIS standard, the hardness measurement was performed five times, and the lowest value and the highest value were rounded down, and the average value of the three values, which was the middle value, was calculated.
Table 1 shows the measurement results.
In the table, (b) and (c) represent alloys in which 0.05 or 0.09 parts by weight of Al is mixed with 100 parts by weight of Au9999.
表１の結果は、Ａｕ−Ａｌの金属間化合物においては、Ａｕに対してＡｌが多くなれば、表面硬度が増すことを示している。
更に、（ｂ）及び（ｃ）は、ビッカーズ硬度が増大し、スリーナインの純度をクリアしているので、本願の目的を達成した実用品を製作することができる。
The results in Table 1 indicate that in the Au—Al intermetallic compound, the surface hardness increases as the Al content increases with respect to Au.
Furthermore, since (b) and (c) have increased Vickers hardness and cleared the purity of three nines, it is possible to produce a practical product that achieves the object of the present application.
（５）変形圧縮強度の測定
変形圧縮強度の測定（微小硬度試験）は、万能試験機オリエンティック ＲＴＣ１３１０を用いた。（図５）。
検体は、ビッカーズ硬度の測定と同一の製造方法で作製したものを用いた。測定結果を表２に示す。
なお、表中（ｂ）及び（ｃ）は、〔００１５〕に記載したものと同様に、Ａｕ９９９９ １００重量部にＡｌをそれぞれ０．０５又は０．０９重量部配合した合金を表す。なお、これらの平打ちリングは、９９９の純度を保持していた。
(5) Measurement of deformation compression strength Measurement of deformation compression strength (micro hardness test) was performed using a universal testing machine, orientic RTC1310. (FIG. 5).
The specimen used was prepared by the same manufacturing method as the measurement of Vickers hardness. The measurement results are shown in Table 2.
In addition, (b) and (c) in the table represent alloys in which 0.05 or 0.09 parts by weight of Al is mixed with 100 parts by weight of Au9999, respectively, in the same manner as described in [0015]. These flat rings had a purity of 999.
表２の測定結果は、ユーザーが本発明に係る９９９Ａｕを、身飾品等として身に付けたとき、何キロの圧力に耐えるかを示しているものである。
Ａｌの値が大きい（ｃ）が、Ａｌの値の小さい（ｂ）よりも圧縮強度が小さいのは、金属間化合物の脆さの影響が出たためと思われる。Ａｕ−Ａｌ金属間化合物は、Ａｌの０．０５％前後が、母体金属であるＡｕに対し、圧縮強度を増すのに最も適した分量だと言える。
The measurement results in Table 2 indicate how many kilograms of pressure the user can wear when wearing the 999Au according to the present invention as an ornament.
The reason why the compressive strength is smaller in the case where the value of Al is large (c) than in the case where the value of Al is small (b) seems to be due to the brittleness of the intermetallic compound. In the Au—Al intermetallic compound, it can be said that about 0.05% of Al is the most suitable amount for increasing the compressive strength with respect to Au as a base metal.
表２の結果は、（ｂ）は、圧縮強度が増加しているので、９９９を維持したまま実用品を製作することができることを示している。 The result of Table 2 shows that (b) can produce a practical product while maintaining 999 because the compressive strength is increased.
なお、従来知られているＡｕ−Ａｌ系合金状態図（図７）によれば、本願の金合金のＡｕ−Ａｌ化合物は、最も安定なＡｕ４Ａｌとして存在することが推定される。 Incidentally, according to the prior known Au-Al alloy phase diagram (Fig. 7), Au-Al compounds of this gold alloy is estimated to be present as the most stable Au 4 Al.
下記に記載する配合と方法により銀合金の地金を鋳造した。
（１）地金（合金）の配合
（イ）Ａｇ（純度９９．９９重量％以上）：１００重量部
（ロ）Ａｌ：０．０５重量部
（２）鋳造条件
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
鋳型温度：６００℃
鋳造温度：１０６０℃
鋳型へセットしてから鋳造までの時間：３分３０秒
なお、鋳造に際し、Ａｌは、圧延して板状にしたＡｇの上下を挟んで、金合金の場合と同様に鋳型にセットした（図１、図２参照）。
A silver alloy ingot was cast according to the composition and method described below.
(1) Blending of bare metal (alloy) (a) Ag (purity 99.99% by weight or more): 100 parts by weight (b) Al: 0.05 parts by weight (2) Casting condition casting machine: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz Using carbon crucible Co., Ltd. Nissei Sales Manufacturer Co., Ltd. Nichiden High Frequency Electric furnace: Yasui Intertech Co., Ltd. Mold temperature: 600 ° C
Casting temperature: 1060 ° C
Time from casting to casting: 3 minutes 30 seconds Note that during casting, Al was placed in the casting mold in the same manner as in the case of a gold alloy with the upper and lower sides of Ag rolled into a plate shape sandwiched between them (see FIG. 1, see FIG.
（３）平打ちリング（図６）の作製
検体の寸法：幅４．００ｍｍ、厚み１．５０ｍｍ
検体数：２０本
使用合金（前記製作した地金）量：１００ｇ
使用鋳造機：TR式高周波発振器 型式NTR−0502SHI−S 出力5Kw 周波数50KHz
カーボン坩堝使用（株）日精販売 メーカー（株）日電高周波
電気炉：（株）安井インターテック
(3) Production of flat ring (FIG. 6) Dimension of specimen: width 4.00 mm, thickness 1.50 mm
Number of specimens: 20 Alloys used (the bullion produced above): 100 g
Casting machine used: TR type high frequency oscillator Model NTR-0502SHI-S Output 5Kw Frequency 50KHz
Nissei Sales Co., Ltd. using carbon crucible Manufacturer Nidec High Frequency Electric Furnace: Yasui Intertech Co., Ltd.
前記リングの作製において、ツリー形状（鋳型になる形状）、埋没方法、脱漏方法、及び鋳造方法は、下記の条件で行った。
ツリー形状：直径８ｍｍ、高さ１２０ｍｍの円柱に、試験資材を円柱に対して、上方向へ角度２５度で上から４本ずつ配置し、２０ｍｍ下の段から付けて、５段のツリー形状とした。
埋没方法：（株）ノリタケカンパニー社のギフトを使用し、水との混合比３８％で、（株）愛工舎製作所の混和器で２分混合し、（株）安井インターテックの脱法器で1分空気を抜き、1時間乾燥の為放置した（室温２５℃、湿度６０％）。
脱漏方法：（株）カトーの温風ヒーターを使用し、温度設定１５０℃、１時間タイマーオフで中のワックスを抜いた。
鋳造方法：鋳型温度６００℃、鋳造温度１０６０℃、鋳型へセットしてから鋳造までの時間は３分３０秒であった。
In the production of the ring, a tree shape (a shape to become a mold), a burying method, a leakage method, and a casting method were performed under the following conditions.
Tree shape: In a cylinder with a diameter of 8 mm and a height of 120 mm, four test materials are arranged from the top at an angle of 25 degrees upward with respect to the cylinder. did.
Method of burying: Using a gift from Noritake Co., Ltd., mixing with water at a mixing ratio of 38% for 2 minutes with a mixer at Aikosha Seisakusho Co., Ltd. The air was evacuated and left to dry for 1 hour (room temperature 25 ° C., humidity 60%).
Leakage method: Using a hot air heater of Kato Co., Ltd., the wax was removed by setting the temperature at 150 ° C. for 1 hour with the timer off.
Casting method: mold temperature 600 ° C., casting temperature 1060 ° C., and the time from setting to casting until casting was 3 minutes 30 seconds.
以下、通常の磨き仕上げ工程（電解研磨、磁気バレル、表面処理、形状成型、磨き工程等）を経て検体をえた（ｂ）。 Hereinafter, a specimen was obtained through a normal polishing finishing process (electropolishing, magnetic barrel, surface treatment, shape molding, polishing process, etc.) (b).
前記〔００２３〕〜〔００２６〕と同様の方法により、下記の（ａ）及び（ｃ）の配合で平打ちリングを作製した。
（ａ）Ａｇ９９９９
（ｃ）Ａｇ９９９９+Ａｌ（０．０９重量部）
なお、前記（ａ）〜（ｃ）の平打ちリングは、スリーナインの純度を保持していた。
By the same method as in the above [0023] to [0026], a flat ring was prepared by the following blending (a) and (c).
(A) Ag9999
(C) Ag9999 + Al (0.09 parts by weight)
In addition, the flat ring of said (a)-(c) kept the purity of three nine.
（４）ビッカーズ硬度の測定
ビッカーズ硬度の測定（微小硬度試験）は、金合金と同様に、アカシ微小硬度試験器ＭＶＫ−Ｇ３５００ＡＴを用いた（図４）。
ビッカーズ硬度は、平打ちリングにダイヤモンドの圧痕を付け（微小硬度測定１）、次に微小硬度距離を測定し、硬度表を参照して数値をだした。
測定はJIS規格の測定方法に則り、硬度測定を５回行い、その最低数値及び最高数値の２つを切り捨て、中旬値である、３つの数値の平均値を算出した。
表３に測定結果を示す。
表中（ｂ）及び（ｃ）は、Ａｇ９９９９、１００重量部に、Ａｌを０．０５又は０．０９重量部配合した合金を表す。
(4) Measurement of Vickers Hardness The measurement of Vickers hardness (micro hardness test) was performed using an Akashi micro hardness tester MVK-G3500AT as in the case of the gold alloy (FIG. 4).
The Vickers hardness was obtained by making a diamond impression on the flat ring (micro hardness measurement 1), measuring the micro hardness distance, and referring to the hardness table.
In accordance with the measurement method of the JIS standard, the measurement was performed five times, and the lowest value and the highest value were rounded down, and the average value of the three values, which was the middle value, was calculated.
Table 3 shows the measurement results.
In the table, (b) and (c) represent an alloy in which 0.05 or 0.09 parts by weight of Al is mixed with 100 parts by weight of Ag9999.
表１によれば、すなわち、（ｂ）および（ｃ）は、９９９を維持したまま、ビッカーズ硬度が増大しているので、実用品を製作することができる。 According to Table 1, that is, (b) and (c) have increased Vickers hardness while maintaining 999, so that a practical product can be manufactured.
（５）変形圧縮強度の測定
変形圧縮強度の測定（微小硬度試験）は、金合金と同様に、万能試験機オリエンティック ＲＴＣ１３１０を用いた。（図５）。
検体は、ビッカーズ硬度の測定と同一の製造方法で作製したものを用いた。測定結果を表４に示す。
この測定は、ユーザーが本発明に係る９９９Ａｇを、身飾品等として身に付けたとき、何キロの圧力に耐えるかを測定しているものである。
表中（ｂ）及び（ｃ）は、〔００２７〕に記載したものと同様に、Ａｇ９９９９、１００重量部に、Ａｌを０．０５又は０．０９重量部配合した合金を表す。
(5) Measurement of deformation compression strength Measurement of deformation compression strength (microhardness test) was performed using a universal testing machine Oriental RTC 1310 in the same manner as the gold alloy. (FIG. 5).
The specimen used was prepared by the same manufacturing method as the measurement of Vickers hardness. Table 4 shows the measurement results.
In this measurement, when the user wears 999Ag according to the present invention as a piece of clothing or the like, it measures how many kilograms of pressure it can withstand.
In the table, (b) and (c) represent alloys in which 0.05 or 0.09 parts by weight of Al is mixed with 100 parts by weight of Ag9999, as described in [0027].
表４の測定結果は、ユーザーが本発明に係る９９９Ａｇを、身飾品等として身に付けたとき、何キロの圧力に耐えるかを示しているものである。
Ａｌの値が大きい（ｃ）が、Ａｌの値の小さい（ｂ）よりも圧縮強度が小さいのは、金属間化合物の脆さの影響が出たためと思われる。Ａｇ−Ａｌ金属間化合物は、Ａｌの０．０５％前後が、母体金属であるＡｇに対し、圧縮強度を増すのに適した分量だと言える。
The measurement results in Table 4 show how many kilograms of pressure the user can withstand when wearing 999Ag according to the present invention as an ornament.
The reason why the compressive strength is smaller in the case where the value of Al is large (c) than in the case where the value of Al is small (b) seems to be due to the brittleness of the intermetallic compound. In the Ag-Al intermetallic compound, it can be said that about 0.05% of Al is an amount suitable for increasing the compressive strength with respect to Ag as a base metal.
表４の結果は、（ｂ）及び（ｃ）は、圧縮強度が増加しているので、９９９を維持したまま実用品を製作することができることを示している。 The results of Table 4 show that (b) and (c) can produce a practical product while maintaining 999 because the compressive strength is increased.
本願発明に係る金合金、又は銀合金からは、公的に９９９の純度が保証された金又は銀の実用品（身飾品、宝飾品等）が製作できる。
したがって、資産価値を維持したままの金又は銀を、実生活に利用して楽しむことができ、宝飾（ジュエリー）業界の需要を刺激し、活性化させることができるので十分な産業上の利用可能性がある。
From the gold alloy or the silver alloy according to the present invention, it is possible to produce a practical product (jewelry, jewelry, etc.) of gold or silver that is publicly guaranteed to have a purity of 999.
Therefore, it can be enjoyed by using gold or silver while maintaining its asset value in real life, and it can stimulate and activate demand in the jewelery industry, so it can be used industrially. There is sex.
１ Ａｌ片
２ Ａｕ板
1 Al piece 2 Au plate
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